Pinion assembly for use with rolls or the like



Jan. 9, 1940. 2,186,522 l PINIoN ASSEMBLY FOR USE WITH ROLLS on THE LIKEW. I...A DITG ES 4' Sheets-Sheet l Filed June* 30, 1939 Jams, 1940.wjl.. DITGES- l 2,186,522-

PINION ASSEMBLY FOR USE WITH ROLLS OR THE LIKE Filed June 50, 1939 4Sheets-Sheet 2 Jan 9 1940, w. D11-GES 2,186,522

PINION ASSEMBLY FOR US WITH ROLLS OR THE LIKE Filed June 30, 1939 4Sheets-Sheet 3 Jan. 9, 1940. w. DITGES` 2,186,522

PINION ASSEMBLY FOR USE WITH ROLLS 0R THE LIKE Filed June 30, 1939 4Sheets-Sheet 4 gmc/Mofo MWWW with the pinions I8 and 20. Therefore,pinion I9 transmits the entire rotative effort at four points diagonallyopposed. It is obvious that `the resulting forces imposed on the maindriving pinion are balanced and relieve the pinion bearings of allpressures. y

In Fig. 5, I have diagrammatically illustrated a conventional assemblyof pinions arranged in relative positions to work rolls inY thelattener. It is to be observed that pinion I9a is the driver whichobtains its power from a source not shown. Pinion I9a meshes withpinions I6a and I 'Ia which in turn mesh with pinions I8a and 29a.

It is obvious that in transmitting the total power, pinion I9a transmitsone-iifth of the total power to the roll in the flattener to which it isconnected. 'I'he rest of the 'power or fourfifths of the' total powerwill have to be transmitted through the pinion teeth of pinion I90L.V

As each pinion requires one-fifth of the total power, it will benecessary to transmit two-fifths at the meshing point of pinion I9a andI6a and I9a and IIa, and one-.fifth at the meshing point of pinion I6aand I8a and I'Ia and 20a..

An analysis of the forces to be transmitted through thesepinions showsthe tooth loads and resultant bearing loads to bein excess for practicalconsideration, vFor example, attention is directed tofpinion IIa, wherethe tooth load rei action I and `the spreading force reaction I, re.Y

sulting frompinion I 9a transmitting two-fifths of the total power topinion I 6a, show a lre-` sultant as indicated S. F. & T. L. R. 1. Nowpinion I6a in transmitting one-fifth lof the total power to pinion I8ashows atooth` load reaction of Tl L "R, 42 and a spreading forcereaction of S. F. R. 2. The resultant being Sv. F. -& T. L. R. 2. Theresultant of these two resultants is indicated as resultantI 1 and 2which is the force to be absorbed by .the bearings of pinion I6a.

The resultant force for pinion I8a is even more extreme than that ofpinion Ilia, as shown graphically. Thus, one is confronted with animpossible condition, and tomake it possible, I

.- resort to the construction shown in Fig. .6

wherein-,I retain pinions I6, I1, I8, I9 and 20 and add two idlerpinions 2| and 22;

" Pinion I9 is still the driver and transmits the total power to thework rolls of the attener.

.Howeven in this assembly the transmission is different than in Fig. 5in that pinion I9 transmitsan equal amount of power' to each ofthe workrolls ofthe lattener by transmitting onefth to each pinion I6, I1, I8and 29,. and onefifth directztov the corresponding work roll to.

Which it is connected. It is to be observed that pinions I5 and I8 donot mesh, nor do I'I and 20 as'they did'in Fig. 5. Thus, theone-fifththat pinion I9 transmits to `each of pinions 'I8 and 2i! isthrough idlers 2| and l22, respectively.

. It will be obvious to one familiar with the art; that the maximumvtooth loads in arrangement Fig. 6=are only one-half of the maximumtooth loads establishedfin Fig. 5, and that for thisreason theres'ultantforces are of an equally u reduced magnitude.

It is also obvious that in Fig. 5 the'maximum force is set up in vthedriving pinion |911` on account of the unbalanced transmission of forcetypical ofthis arrangement whereas in Fig. 6 the corresponding forces indriving pinion I9 are only about 33% of that in Fig. 5 and arediametrically opposed and therefore balanced. Thisbalanced condition offorces' relieves the bearings' of themain driving pinion of all loads"such manner that the same may be readily understood by those: skilledin the art, I am aware that changes may be made in the details disclosedwithoutdeparting from the spirit of the invention as expressed in theclaims.

What I desire to secure by Letters Patent is:

l. In mechanism for driving the rolls of metal plate flattening machinesor the like, a support, a main toothed pinion journalled in said supportand provided at one end with a driven element and at the opposite endwith a driving element,`

a rst pair of pinions jcurnalled in said support and having teethmeshing with the teeth of `the main pinion, each pinion of .said vpairhaving a driving element at one end thereof, a second pair of toothedpinions journalled in the support, arranged at opposite sides of themain pinion and having driving elements at one end thereof, and a pairof idler pinions journalled in the support and having teeth meshing withthefteeth of the main pinion and the teeth of the second pair ofpinions, the pinions of the first pair and the idler pinions beingspaced circumferentially around said main pinion to neutralize thrust.

2. In mechanism for driving the rolls of metal plateiiattening machinesor the'like, a support, a main toothed pinion journalled in said supportand provided at one end with means for driving the same and at theopposite end with a driving element, a irst pair of pinions journalledin said support above the main pinion. Aand having teeth meshing withthe teeth of the -main pinion, each pinion of said pair having a drivingelement at one end thereof, a second pair 'of toothed pinionsjour-nalled in the support atop` posite sides of the main pinion andhaving theirY axes in the same horizontal plane as the axis 'of the mainpinion, and a vpair of idler pinions journalled in the support below themain pinion and having teeth meshing with the' teeth ofthe main pinionand the teeth of the second pair of pinions, the pinions of the firstpair and. the idler pinions being lspaced circumferentially around saidmain pinion to neutralize thrust. 'y

3. In mechanism. for driving the rolls of metal plate flatteningmachines or the like, a support, a main toothed pinion journalled insaid support and provided at one end with means for driving the same andat the opposite end with a driv-V ing element. second and third pinionsjournalled in said support and having teeth meshing with the teeth'ofthe main pinion, each of the second and third pinions havingasdriving'element at one end thereof, fourth and fifth pinionsjournalled in the `supportat opposite sides of the main .pinion andhaving driving elements at 'one end thereof, and a pair ofidler'pinions' journalled err .2,186,5221 y 'fr 3 thirdpinion, thesecond and third pinionsand the 5 plate flattening machines or. thelike, a support, a l

main toothed pinion journalled in said support and provided at onevendwith means for driving the same andat the opposite end with a drivingelement, a first pair of pinions journalled in said g 10 support andhaving teeth meshing with the' teeth of the main pinion, each pinion ofsaid pair hav- 'ing a driving element at one'end thereof, a second pairof pinions journalled in the support and having teeth spaced from theteeth of the "main 15 pinion and the teeth of the rst pairof pinions,

the pinions of the second pair being arranged'at opposite sides of themain' pinion and havingV driving elements at one end thereof, and a pairpinion and the teeth of the second pair of pinions, the pinions of thefirst pair and the idler pinions being spaced circumferentiallyaround Y'pinion to neutralize thrust.

said main pinion to neutralize thrust. A l 25 5. In mechanism fordriving the rolls of metal plate atteningmachines or the like,` asupport,

a main toothed -pinion rjournalled'insaid support and provided at oneend with means for driving Y the same 'and at the oppositeend with adriving element, second and third pinions `journalled in 5 saidsupportVand having teeth meshing with the teeth of the main pinion, each of thesecond and third pinions having a driving element at one end thereof,fourth and fifth toothed pinions journalled in the `support at oppositesides of the 10 main pinion' and having driving elements at one endthereof, and a pair of idler pinions jour- Y nailed in the support andhavingteeth meshing respectively with the teethof thev main pinion andthe teeth of the fourth and fifth pinions, 15 Y f the axis of one of theidler pinionsbeing in a dierent plane than the axis of thesecond pinion,

Y' and the axis of the other idler pinion being in f of idler pinionsjournalled in the support and 20 having teeth meshing with the teeth ofthe main a different plane than the axis ,of the third pinion,-saidplanes being parallel .and positionedzo 'A at oppositesides of the axisof the main pinion, f J the second'and third pinions and the idlerpinions being spaced circumferentially around said main WILLIAM L.;DrrGEs. u

